/*

    Copyright (C) 2015 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    This is the browser window controller declaration.

*/

#import <Cocoa/Cocoa.h>

@class AAPLImageCollection;

typedef enum {

    SlideLayoutKindCircular = 0,

    SlideLayoutKindLoop = 1,

    SlideLayoutKindScatter = 2,

    SlideLayoutKindWrapped = 3

} SlideLayoutKind;

/*

    Each browser window is managed by a AAPLBrowserWindowController, which

    serves as its CollectionView's dataSource and delegate.  (The

    CollectionView's dataSource and delegate outlets are wired up in

    BrowserWindow.xib, so there is no need to set these properties in code.)

*/

@interface AAPLBrowserWindowController : NSWindowController <NSCollectionViewDataSource, NSCollectionViewDelegate, NSCollectionViewDelegateFlowLayout>

{

    // Model

    NSURL *rootURL;                                         // URL of the folder whose image files the browser is displaying

    AAPLImageCollection *imageCollection;                   // the ImageFiles we found in the folder, which we can access as a flat list or grouped by AAPLTag

    // Views

    IBOutlet NSCollectionView *__weak imageCollectionView;  // a CollectionView that displays items ("slides") representing the image files

    IBOutlet NSTextField *__weak statusTextField;           // a TextField that shows informative status

    // UI State

    SlideLayoutKind layoutKind;                             // what kind of layout to use, per the above SlideLayoutKind enumeration

    BOOL groupByTag;                                        // YES if our imageCollectionView should show its items grouped by tag, with header and footer views (usable with Wrapped layout only)

    BOOL autoUpdateResponseSuspended;                       // YES when we want to suppress our usual automatic KVO response to assets coming and going

    NSSet<NSIndexPath *> *indexPathsOfItemsBeingDragged;    // when our imageCollectionView is the source for a drag operation, this array of NSIndexPaths identifies the items that are being dragged within or out of it

}

// Initializes a browser window that's pointed at the given folder URL.

- (id)initWithRootURL:(NSURL *)newRootURL;

#pragma mark Outlets

@property(weak) IBOutlet NSCollectionView *imageCollectionView;

@property(weak) IBOutlet NSTextField *statusTextField;

#pragma mark Actions

- (IBAction)refresh:(id)sender;

#pragma mark Properties

@property SlideLayoutKind layoutKind;

@property BOOL groupByTag;

@end